Resource Type

Journal Article 45

Year

2023 2

2022 2

2021 4

2020 4

2019 5

2017 6

2016 2

2015 3

2014 2

2013 1

2012 1

2011 1

2010 2

2009 2

2008 1

2007 1

2006 2

2005 1

2003 1

2002 1

open ︾

Keywords

Compressive sampling 2

Escherichia coli Laos 1

mcr 1

Aerosol ammonium 1

Airborne tetracycline resistance genes 1

Ammonia gas-to-particle conversion 1

Antibiotics 1

Atmospheric gaseous ammonia 1

Autonomous driving 1

Bayesian analysis 1

Bayesian bootstrap 1

Capture loading 1

China petroleum industry 1

Clustering methods 1

Colistin resistance 1

Deep learning 1

Dense multivariate label distribution 1

Diffusive gradients in thin films 1

FY-3 satellite 1

open ︾

Search scope:

排序： Display mode:

Crop damage monitoring using remote sensing in January and February in South China in 2008

Wu Bingfang,Li Qiangzi,Chi Yaobin,Huang Jinliang,Zhou Wancun,Zhang Weiqi,Wu Shuang

Strategic Study of CAE 2008, Volume 10, Issue 6,   Pages 63-69

Abstract:

The author monitored the crop damage using remote sensing combined with ground survey. First, the author extracted the snow disaster area using multi-phase BJ-1 multi-spectrum data and MODIS data. At same time, 3 ground teams were send to investigate the crop planting proportion and crop damage ratio. Then, crop damage area was calculated using arable area multiplied by crop planting proportion and crop damage ratio in this paper. The results showed that there were 429.76×104 hm2 crops were damaged in Jiangxi, Hubei, Hunan and Guizhou province. Ground survey showed that the main crop-damage area lied in winter wheat and seed rape planting area. The most serious area lied in high-elevate mountain area. For damaged crops, winter wheat was just affected a little because it was in greening stage, and seed rape was effected heavily for in flowing and jointing stage. In southern area of Jiangxi and Hunan province, crop damage area were very small because many cropland were in fallow.

Keywords： snow disaster     crop damage     remote sensing monitoring     GVG sampling instrument    

HTML PDF Collect

Development and Creations of Measuring Instrument Transformers and Their Testing Equipment

Zhao Xiumin,Zhao Yitao

Strategic Study of CAE 2000, Volume 2, Issue 3,   Pages 73-76

Abstract:

The development and creation of measuring instrument transformers and their testing equipment in improvingThey include the development in error compensation for instrument transformers, high accuracy instrumenttransformers with a current booster or voltage booster, current comparators and two-stage instrumentFuture work in this field, will involve the development of instrument transformers with small secondarycurrent and voltage, application of computers and microprocessors in instrument transformers and their

Keywords： instrument transformer     ratio standard     calibrator     error compensation    

HTML PDF Collect

Numerical simulation and experimental research on the wheel brush sampling process of an asteroid sampler

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0732-0

Abstract: To study the influence of the wheel brush rotation speed on the sampling efficiency and the driving torquerequired for the wheel brush, the contact dynamics model between particles and sampling wheel brushesis established and a simulation and experimental verification of the sampling process are conducted.In addition, a set of rotating symmetrical sampling wheel brush devices is built for the ground test,higher, and the driving torque required for the sampling wheel brush is greater.

Keywords： asteroid sampling     wheel brush sampler     discrete element method     parameter calibration     experimental    

HTML PDF Collect

Investigation on sampling artifacts of particle associated PAHs using ozone denuder systems

Kai LIU, Fengkui DUAN, Kebin HE, Yongliang MA, Yuan CHENG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 2,   Pages 284-292 doi: 10.1007/s11783-013-0555-7

Abstract: The goal of this work was to investigate particle associated PAHs sampling artifacts caused by ozoneComparative sampling systems were operated simultaneously during the whole campaign, one with activatedcarbon ozone denuder, the other being set as conventional sampling system.Ambient temperature was founded to have influences on PAHs sampling artifacts.High temperature can increase loss of particle associated PAHs during sampling.

Keywords： particle associated polycyclic aromatic hydrocarbons (PAHs)     ozone     denuder     sampling artifacts    

HTML PDF Collect

Instrument Industry Needs to Develop Ahead of Time

Strategic Study of CAE 2002, Volume 4, Issue 10,   Pages 94-94

HTML PDF Collect

A sampling method based on URL clustering for fast web accessibility evaluation

Meng-ni ZHANG,Can WANG,Jia-jun BU,Zhi YU,Yu ZHOU,Chun CHEN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 6,   Pages 449-456 doi: 10.1631/FITEE.1400377

Abstract: When evaluating the accessibility of a large website, we rely on sampling methods to reduce the costTo improve sampling quality, stratified sampling methods first cluster web pages in a site and then drawIn existing stratified sampling methods, however, all the pages in a website need to be analyzed forTo address this issue, we propose a novel page sampling method based on URL clustering for web accessibilityUsing only the URL information for stratified page sampling, URLSamp can efficiently scale to large websites

Keywords： Page sampling     URL clustering     Web accessibility evaluation    

HTML PDF Collect

using densemultivariate label distribution Project supported by the National Key Scientific Instrument

Gao-li SANG,Hu CHEN,Ge HUANG,Qi-jun ZHAO

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 6,   Pages 516-526 doi: 10.1631/FITEE.1500235

Abstract: Accurate head poses are useful for many face-related tasks such as face recognition, gaze estimation, and emotion analysis. Most existing methods estimate head poses that are included in the training data (i.e., previously seen head poses). To predict head poses that are not seen in the training data, some regression-based methods have been proposed. However, they focus on estimating continuous head pose angles, and thus do not systematically evaluate the performance on predicting unseen head poses. In this paper, we use a dense multivariate label distribution (MLD) to represent the pose angle of a face image. By incorporating both seen and unseen pose angles into MLD, the head pose predictor can estimate unseen head poses with an accuracy comparable to that of estimating seen head poses. On the Pointing’04 database, the mean absolute errors of results for yaw and pitch are 4.01 and 2.13 , respectively. In addition, experiments on the CAS-PEAL and CMU Multi-PIE databases show that the proposed dense MLD-based head pose estimation method can obtain the state-of-the-art performance when compared to some existing methods.

Keywords： Head pose estimation     Dense multivariate label distribution     Sampling intervals     Inconsistent labels    

HTML PDF Collect

Dilution sampling and analysis of particulate matter in biomass-derived syngas

Xiaoliang WANG, Curtis ROBBINS, S. Kent HOEKMAN, Judith C. CHOW, John G. WATSON, Dennis SCHUETZLE

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 320-330 doi: 10.1007/s11783-011-0347-x

Abstract: A dilution sampling system is demonstrated to quantify PM in syngas generated from two gasification plantsThe dilution sampling system enabled reliable measurements over a wide range of concentrations: the useallowed measurement at very low concentrations (~1 μg·m ), while the flexibility of dilution minimized sampling

Keywords： dilution source sampling     syngas characterization     biomass gasification     ultrafine particles    

HTML PDF Collect

Unified methodology for site-characterization and sampling of highway runoff

Jy S. WU, Craig J. ALLAN,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 1,   Pages 47-58 doi: 10.1007/s11783-010-0003-x

Abstract: operational guidance is suggested for implementing highway-runoff monitoring programs that are subject to sampling

Keywords： highway runoff     pollutant loads     regression models     non-point source pollution     storm water permit    

HTML PDF Collect

Uncertainty propagation in dynamics of composite plates: A semi-analytical non-sampling-based approach

Mahdi FAKOOR, Hadi PARVIZ

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1359-1371 doi: 10.1007/s11709-020-0658-8

Abstract: In this study, the influences of spatially varying stochastic properties on free vibration analysis of composite plates were investigated via development of a new approach named the deterministic-stochastic Galerkin-based semi-analytical method. The material properties including tensile modulus, shear modulus, and density of the plate were assumed to be spatially varying and uncertain. Gaussian fields with first-order Markov kernels were utilized to define the aforementioned material properties. The stochastic fields were decomposed via application of the Karhunen-Loeve theorem. A first-order shear deformation theory was assumed, following which the displacement field was defined using admissible trigonometric modes to derive the potential and kinetic energies. The stochastic equations of motion of the plate were obtained using the variational principle. The deterministic-stochastic Galerkin-based method was utilized to find the probability space of natural frequencies, and the corresponding mode shapes of the plate were determined using a polynomial chaos approach. The proposed method significantly reduced the size of the mathematical models of the structure, which is very useful for enhancing the computational efficiency of stochastic simulations. The methodology was verified using a stochastic finite element method and the available results in literature. The sensitivity of natural frequencies and corresponding mode shapes due to the uncertainty of material properties was investigated, and the results indicated that the higher-order modes are more sensitive to uncertainty propagation in spatially varying properties.

Keywords： composite plate     spatially varying stochastic properties     Galerkin method     polynomial chaos approach     semi-analytical approach    

HTML PDF Collect

Data recovery with sub-Nyquist sampling: fundamental limit and a detection algorithm

Xiqian Luo, Zhaoyang Zhang,ning_ming@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900320

Abstract: general bandlimited signal with no information loss, the sub-Nyquist rate may also be sufficient for samplingFirst, the minimum normalized Euclidean distances for the two sampling schemes are calculated which indicatethe performance upper bounds of each sampling scheme.rates (BERs) with different schemes are compared with both their theoretical limits and their Nyquist sampling

Keywords： Nyquist-Shannon sampling theorem     Sub-Nyquist sampling     Minimum Euclidean distance     Under-determined    

HTML PDF Collect

δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1414-6

Abstract:

• Challenges in sampling of NH3 sources for Keywords： Aerosol ammonium     Atmospheric gaseous ammonia     Isotope fingerprinting     Isotope-based source apportionment     Ammonia gas-to-particle conversion    

HTML PDF Collect

A case study on sample average approximation method for stochastic supply chain network design problem

Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW

Frontiers of Engineering Management 2017, Volume 4, Issue 3,   Pages 338-347 doi: 10.15302/J-FEM-2017032

Abstract: branch-and-fix coordination, sample average approximation (SAA) with Bayesian bootstrap, and Latin hypercube sampling

Keywords： supply chain network     stochastic demand     sampling average approximation     Bayesian bootstrap     Latin hypercubesampling    

HTML PDF Collect

Passive source localization using importance sampling based on TOA and FOA measurements Article

Rui-rui LIU, Yun-long WANG, Jie-xin YIN, Ding WANG, Ying WU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 8,   Pages 1167-1179 doi: 10.1631/FITEE.1601657

Abstract: In this paper, we use the Pincus theorem and Monte Carlo importance sampling (MCIS) to achieve an approximatedensity function (PDF) of Gaussian distribution, which is called an important function for efficient samplingHowever, the MCIS method is robust to this prior knowledge for point sampling and correction of importance

Keywords： Passive source localization     Time of arrival (TOA)     Frequency of arrival (FOA)     Monte Carlo importance sampling    

HTML PDF Collect

Mercury source zone identification using soil vapor sampling and analysis

David WATSON,Carrie MILLER,Brian LESTER,Kenneth LOWE,George SOUTHWORTH,Mary Anna BOGLE,Liyuan LIANG,Eric PIERCE

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 596-604 doi: 10.1007/s11783-014-0709-2

Abstract: conducted field tests at the Y-12 National Security Complex in Oak Ridge, Tennessee, USA, to determine if samplingTime-series sampling showed that Hg vapor concentrations were fairly stable over time, suggesting thatthe vapor phase Hg(0) was not being depleted and that sampling results were not sensitive to the soilWe conclude from our studies that soil gas sampling and analysis can be conducted rapidly and inexpensively

Keywords： push probe     spill     characterization     mapping     gas    

HTML PDF Collect

Title Author Date Type Operation

Crop damage monitoring using remote sensing in January and February in South China in 2008

Wu Bingfang,Li Qiangzi,Chi Yaobin,Huang Jinliang,Zhou Wancun,Zhang Weiqi,Wu Shuang

Journal Article

Development and Creations of Measuring Instrument Transformers and Their Testing Equipment

Zhao Xiumin,Zhao Yitao

Journal Article

Numerical simulation and experimental research on the wheel brush sampling process of an asteroid sampler

Journal Article

Investigation on sampling artifacts of particle associated PAHs using ozone denuder systems

Kai LIU, Fengkui DUAN, Kebin HE, Yongliang MA, Yuan CHENG

Journal Article

Instrument Industry Needs to Develop Ahead of Time

Journal Article

A sampling method based on URL clustering for fast web accessibility evaluation

Meng-ni ZHANG,Can WANG,Jia-jun BU,Zhi YU,Yu ZHOU,Chun CHEN

Journal Article

using densemultivariate label distribution Project supported by the National Key Scientific Instrument

Gao-li SANG,Hu CHEN,Ge HUANG,Qi-jun ZHAO

Journal Article

Dilution sampling and analysis of particulate matter in biomass-derived syngas

Xiaoliang WANG, Curtis ROBBINS, S. Kent HOEKMAN, Judith C. CHOW, John G. WATSON, Dennis SCHUETZLE

Journal Article

Unified methodology for site-characterization and sampling of highway runoff

Jy S. WU, Craig J. ALLAN,

Journal Article

Uncertainty propagation in dynamics of composite plates: A semi-analytical non-sampling-based approach

Mahdi FAKOOR, Hadi PARVIZ

Journal Article

Data recovery with sub-Nyquist sampling: fundamental limit and a detection algorithm

Xiqian Luo, Zhaoyang Zhang,ning_ming@zju.edu.cn

Journal Article

δN-stable isotope analysis of NH: An overview on analytical measurements, source sampling and its source

Journal Article

A case study on sample average approximation method for stochastic supply chain network design problem

Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW

Journal Article

Passive source localization using importance sampling based on TOA and FOA measurements

Rui-rui LIU, Yun-long WANG, Jie-xin YIN, Ding WANG, Ying WU

Journal Article

Mercury source zone identification using soil vapor sampling and analysis

David WATSON,Carrie MILLER,Brian LESTER,Kenneth LOWE,George SOUTHWORTH,Mary Anna BOGLE,Liyuan LIANG,Eric PIERCE

Journal Article